ETSI ETS 300 133-5 ed.2 (1997-11)

SLOVENSKI STANDARD
01-december-2003
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ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Enhanced Radio
MEssage System (ERMES); Part 5: Receiver conformance specification
Ta slovenski standard je istoveten z: ETS 300 133-5 Edition 2
ICS:
33.070.20 Sistem za osebni klic Paging systems
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 133-5
TELECOMMUNICATION November 1997
STANDARD Second Edition
Source: ERM Reference: RE/ERM-RP04-007-5
ICS: 33.020
Key words: ERMES, paging, radio
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Enhanced Radio MEssage System (ERMES);
Part 5: Receiver conformance specification
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1997. All rights reserved.

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ETS 300 133-5: November 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 133-5: November 1997
Contents
Foreword .7
Intellectual Property Rights.7
1 Scope .9
2 Normative references.9
3 Definitions, abbreviations and symbols.9
3.1 Definitions .9
3.2 Abbreviations .10
3.3 Symbols .11
4 General test requirements.11
4.1 Number of receivers to be submitted for conformance testing.11
4.2 Normal test conditions .11
4.3 Extreme test conditions .11
4.4 Test fixture .11
4.5 Test paging signal.11
4.5.1 Successful tone-only call.12
4.5.2 Successful numeric message .12
4.5.3 Successful alphanumeric message.12
4.6 Interpretation of measurement results.12
4.7 Intended use .12
5 Radio Frequency (RF) characteristics.13
5.1 Performance requirements .13
5.2 Method of measurement.13
6 User functions .14
6.1 General .14
6.2 Radio identity code (RIC).15
6.3 Receiver paging categories .15
6.3.1 Tone only.15
6.3.2 Numeric.15
6.3.3 Alphanumeric .15
6.3.4 Transparent data.15
6.4 Essential functions.15
6.4.1 Alert functions.15
6.4.2 Silent mode .15
6.4.3 Battery low indication.15
6.5 Optional functions .15
6.5.1 Long message.16
6.5.2 Indication of lost message.16
6.5.3 Urgent message indicator .16
6.5.4 Message storage and retrieval.16
6.5.5 Memory full.16
6.5.6 Repeated call indication .16
7 Tests for essential features.16
7.1 Message reception in home network.17
7.1.1 First message in batch .17
7.1.2 Last message in batch .17
7.1.3 Message continued in next batch.18
7.1.4 Message in last available batch .18
7.1.5 Tenure of message .19

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ETS 300 133-5: November 1997
7.1.6 Two messages in same batch. 19
7.1.7 Message continued in the next subsequence. 19
7.1.8 Multioperator environment. 19
7.2 Message reception from non-home networks. 19
7.2.1 Message reception on all ERMES channels. 20
7.2.2 Recognition of zone code . 20
7.2.3 Two messages in the same batch. 20
7.2.4 Message reception in overlap regions (BAI = 1). 20
7.2.5 Message reception in overlap regions (BAI = 0). 20
7.2.6 Recognition of FSI . 21
7.3 Maximum length message . 22
7.4 Alert function . 22
7.4.1 Normal operation . 22
7.4.2 Silent mode operation. 22
7.5 Termination of numeric messages. 22
7.6 Termination of alphanumeric messages. 23
7.7 Repeated call indication . 23
7.8 Group call. 23
7.9 Tenure of group message. 24
7.10 Low battery indication. 24
7.11 Battery life . 24
7.11.1 No signals on any channel. 24
7.11.2 Unloaded system . 24
7.11.3 Fully loaded system . 25
7.12 Network acquisition time . 25
7.12.1 Time from receiver switch on. 25
7.12.2 Time from loss of signal. 25
7.13 RSVD Bits . 25
8 Tests for optional features. 25
8.1 Operation of long message option . 25
8.2 Indication of lost message. 25
8.3 Urgent message indicator . 26
8.4 Message storage. 26
8.5 Memory full. 26
Annex A (normative): Measurement procedures. 27
A.1 Average measured usable sensitivity expressed as field strength under normal conditions. 27
A.1.1 Definition . 27
A.1.2 Method of measurement . 27
A.2 Radiated spurious components . 28
A.2.1 Definition . 28
A.2.2 Method of measurement . 28
A.3 Co-channel rejection. 29
A.3.1 Definition . 29
A.3.2 Method of measurement . 29
A.4 Adjacent channel selectivity. 30
A.4.1 Definition . 30
A.4.2 Method of measurement . 30
A.5 Spurious response immunity . 31
A.5.1 Definition . 31
A.5.2 Method of measurement . 31
A.6 Intermodulation immunity. 32
A.6.1 Definition . 32
A.6.2 Method of measurement . 32
A.7 Blocking immunity. 33

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ETS 300 133-5: November 1997
A.7.1 Definition.33
A.7.2 Method of measurement.33
A.8 Combined multi-path and quasi-synchronous transmissions.34
A.8.1 Definition.34
A.8.2 Method of measurement.34
Annex B (normative): Ancillary test data .36
B.1 Simulated man .36
B.2 Definition of unwanted test signal.36
B.3 Definition of reference figure .36
B.4 Sensitivity measurement test sites.37
B.4.1 Description of test sites for receiver sensitivity measurements .37
B.4.2 Description of an open air test site .37
B.4.2.1 Receiver sensitivity measurement test site characteristics.37
B.4.2.2 Receiver sensitivity measurement test site .37
B.4.2.3 Position of the equipment under test.38
B.4.2.4 Transmitting antenna.38
B.4.2.5 Calibration .38
B.4.2.6 Substitution antenna.39
B.4.2.7 Selective measuring device.39
B.4.3 Description of an anechoic chamber .40
B.5 Definition of test sites suitable for spurious emissions measurements.40
B.5.1 An anechoic chamber .40
B.5.1.1 General.40
B.5.1.2 Description .40
B.5.1.3 Influence of parasitic reflections.40
B.5.1.4 Calibration and mode of use .41
B.5.2 Open air test site suitable for emission tests .42
B.5.2.1 Test site characteristics for radiated emissions testing.43
B.5.2.2 Radiation emissions test site.43
B.5.2.3 Position of the equipment under test.44
B.5.2.4 Measuring antenna support.44
B.5.2.5 Measuring antenna.44
B.5.2.6 Substitution antenna.45
B.5.2.7 Radio-frequency signal generator .45
B.5.2.8 Selective measuring device.45
B.6 Description of test fixture.45
B.7 Measurement uncertainty.45
B.8 Maximum degradation in required sensitivity .46
B.9 Differential factors .46
B.9.1 General .46
B.9.2 Definition of numeric differential factor .47
B.9.3 Definition of alphanumeric differential factor.47
B.10 Calculations of spurious responses frequencies.48
B.10.1 Introduction to the method .48
B.11 Test time saving procedure.48
History.49

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ETS 300 133-5: November 1997
Foreword
This second edition European Telecommunication Standard (ETS) has been produced by the EMC and
Radio spectrum Matters (ERM) Technical Committee of the European Telecommunications Standards
Institute (ETSI).
This ETS comprises seven parts with the generic title "Electromagnetic compatibility and Radio spectrum
Matters (ERM); Enhanced Radio MEssage System (ERMES)". The title of each part is listed below:
Part 1: "General aspects";
Part 2: "Service aspects";
Part 3: "Network aspects";
Part 4: "Air interface specification";
Part 5: "Receiver conformance specification";
Part 6: "Base station specification";
Part 7: "Operation and maintenance aspects".
This part specifies the receiver performance requirements and the conformance test and measurement
methods.
Transposition dates
Date of adoption: 7 November 1997
Date of latest announcement of this ETS (doa): 28 February 1998
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 August 1998
Date of withdrawal of any conflicting National Standard (dow): 31 August 1998
Intellectual Property Rights
IPRs essential or potentially essential to this ETS may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and
can be found in ETR 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs
notified to ETSI in respect of ETSI standards", which is available free of charge from the ETSI
Secretariat. Latest updates are available on the ETSI Web server (http://www.etsi.fr/ipr).
Pursuant to the ETSI Interim IPR Policy, no investigation, including IPR searches, has been carried out by
ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETR 314 (or the
updates on http://www.etsi.fr/ipr) which are, or may be, or may become, essential to this ETS.

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ETS 300 133-5: November 1997
1 Scope
This European Telecommunication Standard (ETS) defines the receiver conformance specification for the
Enhanced Radio MEssage System (ERMES). Essential features which make up the basic version
receiver of each paging receiver category and also optional receiver features are covered.
2 Normative references
This ETS incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references subsequent amendments to, or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ETS 300 133-4 (1997): "Electromagnetic compatibility and Radio Spectrum
Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 4: Air
interface specification".
[2] ETS 300 133-2 (1997): "Electromagnetic compatibility and Radio Spectrum
Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 2: Service
aspects".
[3] ETR 028: "Radio Equipment and Systems (RES); Uncertainties in the
measurement of mobile radio equipment characteristics".
[4] ITU-T Recommendation E.212: "Identification plan for land mobile stations".
3 Definitions, abbreviations and symbols
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
basic Radio Identity Code (RIC): The prime identity of a paging receiver allocated by the network
operator when service is initiated. It can not be changed without safeguards against unauthorized
changes.
batch number: The 4 bit number corresponding to a particular batch type. Batch type A corresponds to
batch number 0000. Batch type P corresponds to batch number 1111.
channel switching: Receiver is receiving system information on one channel and does not find its initial
address in the address partition. It then switches channels and prepares to receive signals in its batch on
that channel.
codeword: The standard information unit of 30 bits length.
codeblock: The unit of nine codewords used in the message partition.
country code: Binary representation of the country number defined in ITU-T Recommendation E.212 [4],
annex A. The country code consists of 7 bits.
external message: A paging message sent on a network that is not the home network of the addressed
pager. In this case the External Bit (EB) and External Traffic Indicator (ETI) bits are set to "1".
external receiver: A receiver operating in a network which is not its home network.
home network: The operator network with which a mobile subscriber has signed a subscription.
home operator: The network operator to which a specific user has subscribed.
initial address: The 18 most significant bits of the local address.

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ETS 300 133-5: November 1997
local address: The number used by a network to identify the receivers subscribed to it. It consists of
22 bits. The four least significant bits of the local address denote the batch number of the receiver.
operator code: The number used by the system on the radio path to identify an operator within a country.
It consists of 3 bits.
operator identity: The number used by the system on the radio path to identify the home operator of a
receiver. It has a total length of 13 bits and consists of three parts, the zone code the country code and the
operator code.
paging area: The area controlled by a paging area controller. It is the minimum area to which a mobile
subscriber is permitted to subscribe in order to receive his paging messages.
paging message: The tone-only, numeric, alphanumeric or transparent data information sent to a paging
receiver.
paging signal: The signal sent on the radio path to a paging receiver.
Radio Identity Code (RIC): The number used by the system on the radio path to identify the receiver(s)
for which the paging message is intended. The RIC has a total length of 35 bits and consists of five parts:
the zone code (3 bits), the country code (7 bits), the operator code (3 bits), the initial address (18 bits) and
the batch number (4 bits).
Table 1
Operator identity Local address
Zone code Country code Operator code Initial address Batch number
3 bits 7 bits 3 bits 18 bits 4 bits
reserved for future definition: The bits indicated are not specified in this edition of the ETS but may be
in future editions. The bits should be set to a default value and not used to convey information. The
function of any equipment is independent of these bits. No fixed pattern of reserved bits should be
assumed and no combination of reserved bits should cause equipment to malfunction.
zone code: Binary representation of the zone number defined in ITU-T Recommendation E.212 [4],
annex A. The zone code consists of 3 bits.
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
AII Additional Information Indicator
AIN Additional Information Number
APT Address Partition Terminator
BAI Border Area Indicator
BER Bit Error Ratio
CTA Common Temporary Address
CTAP Common Temporary Address Pointer
EB External Bit
EOM End Of Message
ETI External Traffic Indicator
FM Frequency Modulation
FSI Frequency Subset Indicator
FSN Frequency Subset Number
IA Initial Address
LCD Liquid Crystal Display
MD Message Delimiter
NaCl Sodium Chloride
OPID Operator Identity
PAM Pulse Amplitude Modulation
p.d. potential difference
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ETS 300 133-5: November 1997
PR Preamble
RF Radio Frequency
RIC Radio Identity Code
rms root mean square
RSVD reserved
SI System Information
SSI Supplementary System Information
SYN synchronization
UMI Urgent Message Indicator
3.3 Symbols
For the purposes of this ETS, the following symbols apply:
ENL Number of LSBs to be compared when operating outside the home network
HNL Number of LSBs to be compared when operating within the home network
4 General test requirements
4.1 Number of receivers to be submitted for conformance testing
In order to simplify the testing of receiver spurious emissions the manufacturer, may supply one receiver
able of being set into a test mode which will enable the receiver to stay in a normal receive mode. This
mode is with the receiver continuously receiving and decoding ERMES data.
One receiver shall be provided for testing.
The receiver shall be programmed with RIC number:
010 0000001 010 1100011000111001 00 0000
The frequency subset number of this receiver shall be set to 3 (0011).
4.2 Normal test conditions
The normal test conditions shall be temperature +15°C to +35°C and relative humidity from 20 % to 75 %,
non condensing.
The normal test voltage shall be that declared by the manufacturer.
4.3 Extreme test conditions
The temperature range shall be -10°C to +55°C and relative humidity from 20 % to 75 %, non condensing.
The extreme test voltages shall be declared by the manufacturer.
4.4 Test fixture
A test fixture (see clause B.6) shall be used for all tests unless otherwise stated. Test fixtures to enable
tests under extreme temperature and voltage conditions shall be provided by the manufacturer if required
by the testing laboratory.
4.5 Test paging signal
The transmissions shall be in accordance with ETS 300 133-4 [1].
The batch structure used during testing shall contain one address in the address partition followed by one
message in the message partition as shown in subclause 7.1.1 unless otherwise specified.

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ETS 300 133-5: November 1997
The test paging message to the receiver under test may be tone only, 10 numeric characters or
55 alphanumeric characters from the basic character set (see ETS 300 133-2 [2] table B.3), according to
the feature under test.
For successful calls the receiver shall respond to the transmitted test paging message as stated in the
following subclauses.
4.5.1 Successful tone-only call
A successful tone-only call occurs when the receiver presents an alert as declared by the manufacturer.
The full error capability of the code may be used.
4.5.2 Successful numeric message
For successful numeric calls the receiver shall present the transmitted test paging message as declared
by the manufacturer correctly without error. The full error capability of the code may be used. A character
in error is defined as a character that differs from the transmitted character.
4.5.3 Successful alphanumeric message
For successful alphanumeric calls, the receiver shall present the transmitted test paging message as
declared by the manufacturer, except as allowed in the average usable sensitivity test defined in
clause A.1. The full error capability of the code may be used. A character in error is defined as a character
that differs from the transmitted character.
4.6 Interpretation of measurement results
The interpretation of the results recorded in a test report for the measurements described in this ETS shall
be as follows:
a) the measured value related to the corresponding limit shall be used to determine whether the
receiver meets the requirements of this ETS;
b) the measurement uncertainty value for the measurement of each parameter shall be included in the
test report;
c) the recorded values of the measurement uncertainty shall be, for each measurement, equal to or
lower than the figures given in clause B.7.
4.7 Intended use
The intended use of the receiver shall be declared by the manufacturer as being body worn or non body
worn, according to the class shown in table 2.
Table 2: Intended use
Body worn Non body worn
Class 1 2
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ETS 300 133-5: November 1997
5 Radio Frequency (RF) characteristics
5.1 Performance requirements
The receiver supplied shall meet or exceed the performance criteria in table 3 when measured in
accordance with methods of measurement defined in subclause 5.2.
Table 3
Requirement Method of Limit value
Measurement
subclause
a) the average usable sensitivity under normal conditions. 5.2 a) 25 dBμV/m
b) the maximum degradation in required sensitivity under 5.2 c) 0 dB
normal conditions with a transmitter frequency offset of
±200 Hz.
c) the maximum degradation in required sensitivity 5.2 l) 0 dB
(see annex B, clause B.8) under switching channel
conditions.
d) the maximum degradation in required sensitivity 5.2 m) 6 dB
(see annex B, clause B.8) under extreme temperature
and voltage conditions.
e) the maximum degradation in required sensitivity 5.2 c) 6 dB
(see annex B, clause B.8) under extreme temperature
and voltage conditions with a transmitter frequency offset
of ±200 Hz.
f) co-channel rejection under normal conditions. 5.2 e) -10 dB
g) adjacent channel selectivity under normal conditions. 5.2 f) 60 dB
h) adjacent channel selectivity under extreme conditions. 5.2 f) 50 dB
j) spurious response immunity under normal conditions. 5.2 g) 76 dBμV/m
k) intermodulation immunity under normal conditions. 5.2 h) 70 dBμV/m
l) blocking immunity or desensitization under normal 5.2 j) 84 dBμV/m
conditions.
m) maximum usable input level under normal conditions. 5.2 d) 3 V/m
n) the maximum degradation in sensitivity for combined 5.2 k) 15 dB
multi-path and quasi-synchronous transmissions under
normal conditions.
o) spurious emissions under normal conditions: 5.2 b)
30 MHz - 1 GHz; 2 nW;
1 GHz - 4 GHz; 20 nW;
ERMES channels. 2 pW.
5.2 Method of measurement
Measurements shall be conducted on ERMES frequency number 8 (see ETS 300 133-4 [1],
subclause 8.2) unless otherwise stated. The measurements shall be conducted according to the following
steps: the transmission used for these tests shall be constructed as shown in figure 1 unless (otherwise
stated):
NOTE: MESSAGE a message appropriate to receiver under test.
MD Message Delimiter.
Figure 1
For all the measurements in this subclause sufficient time is to be allowed for the receiver to achieve
synchronization before the performance criteria are determined. This time and the time during which the
receiver remains on channel after loss of signal shall be declared by the manufacturer:

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ETS 300 133-5: November 1997
a) the average usable sensitivity expressed as the field strength shall be measured as described in
clause A.1. The test site (see clause B.4) shall be complemented with a "simulated man"
(see clause B.1). Any ERMES frequency may be used;
b) the measurement procedure for spurious radiation shall be carried out as described in clause A.2;
c) the measurement of the sensitivity shall be repeated under normal and extreme conditions together
with a transmitter offset of 200 Hz in a test fixture complying with clause B.6, according to
subclause A.1.2 steps b) to e);
d) measurement of usable input level range: the receiver shall correctly present four messages out of
four. The test shall be carried out in a test fixture as defined in clause B.6 with the wanted signal
adjusted so that the field strength at the receiver shall be 3 V/m;
e) measurement of the co-channel rejection shall be carried out as described in clause A.3;
f) the measurement of the adjacent channel selectivity under normal and extreme conditions shall be
carried out as described in clause A.4;
g) the measurement of the spurious response immunity shall be carried out as described in
clause A.5;
h) the measurement of the intermodulation immunity shall be carried out as described in clause A.6;
j) the measurement of the blocking immunity or desensitization shall be carried out as described in
clause A.7;
k) the measurements of quasi-synchronous sensitivity combined with multi-path shall be made at a
simulated speed of 3 km/h. A second signal with the same data content but delayed 50 μs, 1 dB
weaker and 30 Hz RF frequency offset shall be added. The test procedure is given in clause A.8
(see clause B.8);
l) channel switching: the sensitivity shall be measured in an appropriate test fixture (see clause B.6)
with the following test signal according to subclause A.1.2 steps b) to e): a batch shall be
transmitted consisting of 139 initial addresses numerically higher than the initial address of the
receiver under test. This shall be immediately followed by the test message shown in
subclause 7.1.1, transmitted on the appropriate channel (see ETS 300 133-4 [1], figure 2). The
signal strength of both channels shall remain constant during the test. Both transmissions shall
occur in batches of the same type (i.e. same batch number) within the same subsequence; both
channels shall broadcast a network identity different from the receiver OPerator IDentity (OPID) and
ETI shall be set to 1 for both channels;
m) the measurement of the sensitivity shall be repeated under normal and extreme conditions in a test
fixture complying with clause B.6, according to subclause A.1.2 steps b) to e).
6 User functions
6.1 General
Receiver functions are qualified as essential or optional.
Essential functions shall be implemented in so far as they are relevant to the particular receiver paging
category. Implementation of optional functions shall be left to the manufacturers' discretion.
The basic version receiver within each receiver paging category is the receiver offering only the essential
functions.
Additional functions not mentioned in this ETS may be implemented provided that they do not conflict with
the radio interface and do not adversely affect the functions listed in this ETS.
Any additional functions incorporated into the receiver shall be declared by the manufacturer.
Each receiver shall be individually identifiable.

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ETS 300 133-5: November 1997
6.2 Radio identity code (RIC)
Each receiver shall have one basic RIC.
Further additional RICs may be incorporated so long as the full receiver specification is satisfied for each
RIC.
Discrimination between calls on different RICs shall be offered.
6.3 Receiver paging categories
6.3.1 Tone only
A receiver providing this function shall respond to at least one combination of the alert signal indicator bits.
Responses to the remaining seven alert indicator bits shall (if implemented) be clearly distinguishable.
6.3.2 Numeric
A receiver including this function shall provide for the reception of a 20 digit numeric message. The
numeric character set is included in ETS 300 133-2 [2] annex B. Receivers having this function shall also
have the tone-only function.
6.3.3 Alphanumeric
A receiver including this function shall provide for the reception of a 400 character alphanumeric message
and implement the basic character set (see ETS 300 133-2 [2] table B.3). Receivers having this function
shall also have the numeric and the tone only functions.
As an optional feature, the pager may also include any additional character sets, as defined in
ETS 300 133-2 [2] annex B.
6.3.4 Transparent data
A receiver including this function shall provide for the reception of an arbitrary data message.
6.4 Essential functions
6.4.1 Alert functions
Receivers shall respond to at least the type zero alert signal indicator (see ETS 300 133-4 [1],
subclause 5.5.1.1) for each RIC.
Provision shall be made for manual termination of an alert signal.
6.4.2 Silent mode
It shall be possible for the user to inhibit the sounding of an audible alert. The receiver shall still receive
and store paging calls even when the alert tone is set to silent mode.
6.4.3 Battery low indication
An indication shall be given of battery exhaustion.
6.5 Optional functions
Optional features, if implemented, shall conform with the relevant part of ETS 300 133-4 [1]. When not
defined in this part of the ETS, manufacturers shall supply test methods and results demonstrating
conformance.
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ETS 300 133-5: November 1997
6.5.1 Long message
All receiver categories (other than tone-only) may be capable of handling long messages. The maximum
time between the transmission of submessages shall not exceed the time between the start of an active
cycle and the start of the next active cycle, defined by HNL or ENL, plus one minute.
6.5.2 Indication of lost message
All receiver categories, except tone-only, shall have the capability to detect message numbers
(see ETS 300 133-4 [1], subclause 5.5.1) and compare the last received number with the number
previously received. If there are one or more numbers missing an indication shall be given.
6.5.3 Urgent message indicator
Receivers shall indicate reception of an urgent message.
6.5.4 Message storage and retrieval
Receivers may have memory to store the information received. All receivers having this function shall be
able to use the storage capacity for storing messages of varying length. It shall be possible for the stored
messages to be retrieved.
6.5.5 Memory full
If the receiver memory is full the oldest message not protected against deletion should be erased. The
memory management may be performed differently for the different RICs.
6.5.6 Repeated call indication
In the case where a receiver receives more than one transmission of a message an indication shall be
given accordingly.
7 Tests for essential features
This clause defines tests covering the essential requirements of ERMES receivers. All tests shall be
performed with a signal level +30 dB relative to the average usable sensitivity. Unless otherwise stated,
the tests should be carried out after the receiver has reached steady state conditions.
The test protocol used in this clause complies with ETS 300 133-4 [1]. Part of subclause 4.4 of
ETS 300 133-4 [1] is reproduced here to identify the test parameters.
J*APT
I* K*CODE BLOCKS
MESSAGE
SYNCH ADDRESS
SYSTEM INF
PART PARTITION PARTITION
PARTITION
NOTE: PR Preamble word
SYN synchronization wor
SI System Information word
SSI Supplementary System Information word
IA Initial Address
APT Address Partition Terminator
CODEBLOCK interleaved message codeword
I number of initial addresses
J number of address partition terminators
K number of codeblocks in the message partition
Figure 2
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ETS 300 133-5: November 1997
Codeword composition of a batch satisfies the following relationships:
-0 ≤ I ≤ 139;
- J = 9 - MOD{(4 + I),9)} where MOD {M,N} = M - N*INT(M/N) and INT returns the integer
part of a number;
-K ≤ (149 - I - J)/9 first 15 batches of a subsequence;
-K ≤ (185 - I - J)/9 last batch of a subsequence.
7.1 Message reception in home network
The purpose of this subclause is to ensure that the receiver can receive a message in all legitimate
locations within a transmission in a multioperator environment. On channel 8, the zone and operator code
details contained within the System Information (SI) partition shall indicate home network transmissions to
the receiver; the B
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